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Polyethane conveyer belt for coal mine and its making process

A manufacturing method, polyurethane technology, applied in applications, belts, household appliances, etc., can solve problems such as low friction coefficient, fire hazard, and degradation of rubber wear resistance, and achieve simple molding process, less equipment investment, and high conveying efficiency Effect

Active Publication Date: 2007-06-06
东莞华工佛塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the rubber needs to be reinforced with a large amount of carbon black during the processing, the rubber conveyor belt is easy to burn, causing a fire hazard
In order to improve the flame retardant performance of rubber covering rubber, it is necessary to add a large amount of flame retardant to the rubber formula, so that the performance of the rubber, especially the wear resistance, will be greatly reduced, thus affecting the service life of the conveyor belt.
The conveyor belt covered with plastic such as polyvinyl chloride has good flame retardant performance, but its surface rubber has poor elasticity and low friction coefficient, especially when the conveyor belt is wet with water, it is easy to slip on the conveyor belt surface, and the carrying efficiency is low. Low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present invention comprises following steps and processing condition:

[0029] Step 1: Preparation of strip blank

[0030] The commonly used braided belt core impregnated with polyvinyl chloride paste and plasticized at high temperature is selected as the belt blank. Wipe the surface clean with ethyl acetate, spray or brush the adhesive prepared in patent 200510101982.4, and then it can be used for cast polyurethane conveyor belt.

[0031] Step 2: Preparation of polyurethane covering glue system

[0032] In this embodiment, the covering glue polyurethane elastomer adopts a polytetrahydrofuran diol / toluene diisocyanate system with a molecular weight of 1000, and the flame retardant adopts resorcinol bis(diphenyl phosphate) or a phosphorus flame retardant with the trade name NceydXP30 , the system was synthesized by a conventional method.

[0033] Weigh 100 parts by mass of polytetrahydrofuran diol with an average molecular weight of 1000, put it into a reaction ke...

Embodiment 2

[0040] The present invention comprises following steps and processing condition:

[0041] Step 1: Preparation of strip blank

[0042] Unwind the belt blank that has been plasticized at high temperature and coiled, wipe the surface clean with ethyl acetate, brush the same adhesive as in Example 1, and then it can be used for casting polyurethane conveyor belts.

[0043] Step 2: Preparation of polyurethane covering glue system

[0044] In this embodiment, the cover rubber polyurethane elastomer adopts the polycaprolactone diol / diphenylmethane diisocyanate system with a molecular weight of 1000, and the flame retardant adopts the halogenated flame retardant ethane 1,2 bis(pentabromobenzene) or four Bromophthalic anhydride derivatives, the system is synthesized by conventional methods.

[0045] Weigh 100 parts by mass of polycaprolactone diol with an average molecular weight of 1000, put it into a reaction kettle, heat to 120±10°C, evacuate until the residual pressure is less th...

Embodiment 3

[0052] The present invention comprises following steps and processing condition:

[0053] Step 1: Preparation of strip blank

[0054] After the belt blank is plasticized and shaped at high temperature, the surface is wiped clean with acetone, and the same adhesive as in Example 1 is sprayed, and then it can be used for casting polyurethane conveyor belt.

[0055] Step 2: Preparation of polyurethane covering glue system

[0056] In this example, the covering glue polyurethane elastomer adopts the polycaprolactone diol / toluene diisocyanate system with a molecular weight of 2000, and the flame retardant adopts phosphorus-halogen composite flame retardant PUR3 or phosphorus-based flame retardant FyrolPNX, and the system is synthesized according to a conventional method .

[0057]Weigh 100 parts by mass of polycaprolactone diol with an average molecular weight of 2000, put it into a reaction kettle, heat to 120±10°C, evacuate until the residual pressure is less than 500Pa, remove...

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PUM

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Abstract

The present invention relates to polyurethane conveyer belt for coal mine and its making process. The polyurethane conveyer belt is covered with polyurethane elastomer, which is one polyol oligomer / toluene diisocyanate system or one polyol oligomer / diphenyl alkyl diisocyanate system. The polyurethane has optimized recipe, phosphate fire retardant and / or halogen fire retardant added while synthesis and in the amount accounting for 5-20 wt% of the pre-polymer, and antistatic agent of quaternary ammonium salt type surfactant one conducting carbon black added while casting the covering elastomer.The modified polyurethane elastomer is fire retardant, antistatic, wear resistant and suitable for use in coal mine, and has long service life and capacity of resulting in high conveying efficiency.

Description

technical field [0001] The invention relates to a polyurethane elastomer, more specifically, to a flame-retardant, antistatic, wear-resistant polyurethane conveyor belt for coal mines and a manufacturing method thereof. technical background [0002] According to the different types of covering rubber, the conveyor belts used in coal mines are currently divided into two categories: rubber conveyor belts and plastic conveyor belts. The rubber conveyor belt has good surface elasticity, is not easy to slip, and has high conveying efficiency. However, since rubber needs to be reinforced with a large amount of carbon black during the processing process, the rubber conveyor belt is easy to burn, causing a fire hazard. In order to improve the flame retardant performance of rubber covering rubber, it is necessary to add a large amount of flame retardant to the rubber formula, so that the performance of the rubber, especially the wear resistance, will be gre...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K5/36B29D29/06C08K3/04
Inventor 张海
Owner 东莞华工佛塑新材料有限公司
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